Question: Who was the stepparent of Napolean.
Paraphrase: To whom did Napolean's parents get re-married?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P3448 wd:Q517 . ?sbj wdt:P31 wd:Q5 } 
Answer: Eugène de Beauharnais, Stéphanie de Beauharnais